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EP0618091B1 - Bandage pneumatique pour véhicule - Google Patents

Bandage pneumatique pour véhicule Download PDF

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Publication number
EP0618091B1
EP0618091B1 EP94890059A EP94890059A EP0618091B1 EP 0618091 B1 EP0618091 B1 EP 0618091B1 EP 94890059 A EP94890059 A EP 94890059A EP 94890059 A EP94890059 A EP 94890059A EP 0618091 B1 EP0618091 B1 EP 0618091B1
Authority
EP
European Patent Office
Prior art keywords
fine incisions
profile
fine
profile block
vehicle tyre
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94890059A
Other languages
German (de)
English (en)
Other versions
EP0618091A1 (fr
Inventor
Werner Dr. Liederer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Semperit Reifen AG
Semperit AG Holding
Original Assignee
Semperit Reifen AG
Semperit AG Holding
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Semperit Reifen AG, Semperit AG Holding filed Critical Semperit Reifen AG
Publication of EP0618091A1 publication Critical patent/EP0618091A1/fr
Application granted granted Critical
Publication of EP0618091B1 publication Critical patent/EP0618091B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
    • B60C2011/1213—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe sinusoidal or zigzag at the tread surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
    • B60C2011/1245—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern being arranged in crossing relation, e.g. sipe mesh

Definitions

  • the present invention relates to a vehicle tire intended in particular for winter use with a tread pattern which has tread blocks which are each provided with a large number of fine incisions radiating from the central region of the respective tread block and extending to the tread block edges.
  • Pneumatic vehicle tires with tread treads have proven themselves very well in recent years, particularly when used in winter driving conditions, either on snowy or icy surfaces.
  • Such a vehicle tire is known for example from AT-B 390.915.
  • the tread pattern of this pneumatic vehicle tire has a profile rib that runs around the center circumferential line of the profile and, to the side of this rib, two rows of blocks composed of tread blocks lined up in the circumferential direction. Both the central rib and the profile blocks in the rows of blocks are each provided with a number of fine incisions running continuously over the block width or the rib width. These fine incisions run essentially parallel to one another and are also essentially equally spaced from one another.
  • the fine incisions are also oriented in the axial direction such that they enclose an angle of approximately 30 ° with the axial direction over a large part of their length.
  • Tires with such a tread pattern generally have good grip properties.
  • the pronounced alignment of the fine incisions in the axial direction means that the tread blocks have a relatively low bending stiffness in the circumferential direction, but a relatively high bending stiffness in the transverse direction, which impairs the transmission of drive and braking forces and the driving behavior, in particular when cornering.
  • a vehicle tire with a tread pattern according to the preamble of claim 1 is known from JP-A 1 047 603. It is provided here that the fine cuts each start from a central recess in the block and either run in the transverse profile direction or at least have a section which runs in the transverse profile direction and with which the fine cuts run to the block edges and open into grooves.
  • the central depression has a depth that corresponds to the depth of the fine incisions, the depth of which is chosen to be at least 50% of the general profile depth.
  • the design comes to you Cutting through and dividing the block into a larger number of block parts makes the block soft, flexible and unstable, which is particularly disadvantageous for the abrasion behavior and can cause cracks.
  • the invention is therefore based on the object of improving a pneumatic vehicle tire of the type mentioned at the outset so that the tread blocks, while still having good grip properties, have a high degree of flexural rigidity, both in the circumferential and in the transverse direction, with an influence on the flexural rigidity in one or the other direction should be possible.
  • the central region is solid and thus free of any profiling, at least two of the fine incisions starting from the central region running in opposite directions at least substantially in the circumferential direction, and each of the fine incisions over its entire length its basic extension direction at least essentially maintains.
  • the profile central block can be given a relatively high bending stiffness both in the circumferential direction and in the axial direction due to the solid central region.
  • the radial arrangement also creates grip edges that work both when driving straight ahead and when cornering, which is a great advantage when using tires with such tread blocks under winter driving conditions.
  • the fine incisions are designed, viewed in plan view, as straight, wave-like or zig-zag-shaped fine incisions.
  • the radial incisions viewed in plan view, have a slightly curved course, in particular all the fine incisions running within a profile block being curved in the same direction.
  • the number of fine incisions radiating in the profile block is at least 4, in particular between 8 and 12.
  • two fine incisions located opposite one another with respect to the central region can be connected to one another by a straight line, these straight lines having a common intersection in the center of the profile block.
  • the fine incision ends in the central area of the profile block are at a minimum distance of two millimeters.
  • the radial fine incisions in the profile block are at least substantially evenly distributed.
  • the radial fine incisions in the profile block are arranged and distributed such that the sum of all the length components of the fine incisions projectable in the axial direction is at least 1.5 times, preferably 2 to 3 times, the sum of all in Corresponds to the circumferential direction of projectable length components.
  • Such tread blocks are preferably arranged in the central area of the tread, since this takes into account the fact that it is favorable for the traction behavior when accelerating and braking if a transverse orientation of fine incisions predominates in the central area of the tread.
  • FIG. 1 shows top views of an individual tread block with different embodiments of the invention and
  • FIG. 4 schematically shows the top view of a partial development of a tread pattern designed according to the invention.
  • Fig. 1 shows schematically the top view of a tread block as it can be contained in tread profiles of pneumatic vehicle tires.
  • Such profile blocks have often the at least substantially parallelogram-shaped basic shape shown in FIG. 1, but can also be approximately rhomboidal or rectangular in shape.
  • the actual block shape is irrelevant to the present invention and the parallelogram-shaped basic shape shown is only used for illustrative purposes.
  • the tread block 1 has block edges 1a, 1'a and 1b, 1'b, the block edges 1b, 1'b being aligned in the circumferential direction of the tread pattern and the tread block edges 1a, 1'a being inclined at an acute angle with respect to the axial direction of the tire are.
  • the area of a tread pattern in contact with the ground can now be composed of four rows of tread blocks over the circumference of the tire, as shown, for example, in FIG. 4, the number of tread blocks per row of blocks generally being chosen between 55 and 80 blocks.
  • the width of the tread in the ground contact area which is determined in a tire with a certain dimension under standardized conditions (standard air pressure, standard load, tire applied to its standard rim), is designated by B.
  • the profile block 1 is provided with a large number of fin slits 2, which radiate from a central area within the profile block 1, which corresponds to the area of the center of gravity in this exemplary embodiment, up to the profile block edges 1a, 1'a, 1b, 1 'b run. In this embodiment as well as in all other embodiments, this central area is free of any further profiling and is therefore solid.
  • two lamella fine incisions 2a are provided, which run in the circumferential direction, two lamella fine incisions 2b each, which run at least substantially parallel to the profile block edges 1a, 1'a, and two lamella fine incisions 2c, each in the block quadrant between a circumferential fine lamella incision 2a and a lamella fine incision 2b running parallel to the profile block edge 1a, 1'a are arranged. It is advantageous if, as shown, none of the fin slits 2a, 2b, 2c run into a tread block corner, since this could result in undesirable crack formation in these areas during tread wear during tire operation.
  • the fine incision ends in the central region of the profile block 1 are at a certain minimum distance from one another which should not be less than two millimeters.
  • Two of these incisions 2a, 2b, 2c can be connected with a line, so that these lines intersect in the center of area of the profile block 1.
  • the radial arrangement of the Fine incisions at 2a, 2b and 2c an essentially uniform distribution of the fine incisions 2 in the profile block 1.
  • the lamella fine incisions 2a, 2b and 2c are, viewed in plan view, straight-lined and are selected in a width of 0.3 to a maximum of 1 mm, in particular in a width between 0.4 and 0.6 mm.
  • the lamella fine incisions 2a, 2b, 2c also have a depth which preferably corresponds to at least 30% of the design depth. However, the fine incisions can have a smaller depth in places, which can have a favorable effect on the profile block stability.
  • At least four radial incisions are provided in a profile block.
  • a relatively high density of fine cuts can be created, the profile block 1 having a relatively high bending rigidity both in the circumferential direction and in the axial direction.
  • a relatively high number of grip edges is created, namely grip edges which act both when driving straight ahead and when cornering and lateral steering forces, which is particularly advantageous for tires which are intended to be suitable for use in winter driving conditions.
  • FIG. 2 shows an embodiment variant of a profile block 11 which corresponds in its basic form to the profile block according to FIG. 1, the lamella fine incisions 12 having a radial arrangement which corresponds to that of FIG. 1, in contrast to FIG. 1, the fine incisions 12 , viewed in plan view, zigzag or wavy design.
  • FIG. 3 shows an embodiment in which the fine incisions 22 arranged radially in the profile block 21 have a slightly curved course, a uniform course being chosen for all fine incisions 22.
  • Fig. 4 shows a possible embodiment of a tread pattern with blocks with radially arranged fine incisions.
  • the tread pattern is designed as a so-called swept or direction-bound profile and is composed of four rows of blocks, each with at least substantially parallelogram-shaped tread blocks 32, 42, through their arrangement three straight and circumferential grooves 4 and, viewed across the tread width , lateral grooves 5 running essentially along a V are formed.
  • the two rows of profile blocks running in the middle of the tread area have individual blocks 32 with radially arranged fin slits 2 ′, which have a specific arrangement or distribution in the profile block 32.
  • FIG. 4 shows a possible embodiment of a tread pattern with blocks with radially arranged fine incisions.
  • the tread pattern is designed as a so-called swept or direction-bound profile and is composed of four rows of blocks, each with at least substantially parallelogram-shaped tread blocks 32, 42, through their arrangement three straight and circumferential grooves 4 and, viewed across the tread width , lateral groove
  • some of the lamellae fine incisions 2 ' have both a component which can be projected in the axial direction and a component in the circumferential direction.
  • the arrangement of the fine incisions 2 'in these profile blocks 32 is now such that the sum of all length components that can be projected in the axial direction is greater than the sum of all lengths projected in the circumferential direction.
  • the sum of all length components of the fine incisions 2 ′ that can be projected in the axial direction is preferably at least 1.5 times the sum of all length components that can be projected in the circumferential direction, preferably 2 to 3 times. This can take into account the fact that it is favorable for the traction behavior when accelerating and braking if a transverse orientation of fine incisions predominates in the central area of the tread.
  • the profile blocks 42 are provided with fine incisions 2 ′′, the arrangement of which corresponds to those shown in the profile block according to FIG. 1.
  • the shoulder blocks therefore have a balanced stability, which has a favorable effect on the handling properties, for example on the steering behavior when cornering.
  • the block bending stiffness can be further influenced by the targeted arrangement and length selection of the fine incisions.
  • the present invention is not restricted to the exemplary embodiments shown. It is thus possible in particular to use the invention also in tread patterns, where rows of blocks are combined with tread bands and regardless of whether a tread pattern or a conventional profile is thereby formed. With regard to the arrangement, the number and the longitudinal extent of the fine incisions, the designer has a large number of possibilities, so that various tread properties, such as the profile stability and grip behavior, can be influenced to the desired extent. It is of course also possible with one and the same tread pattern to combine profile elements with radial incisions designed according to the invention and with profile elements that have conventional fine incision designs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Turning (AREA)
  • Pulleys (AREA)

Claims (8)

  1. Bandage pneumatique pour véhicule, notamment destiné à l'utilisation dans des conditions de déplacement hivernales, comportant un profil de bande de roulement muni de blocs profilés (1, 11, 21, 32, 42) qui présentent, à chaque fois, un grand nombre de minces entailles (2, 2', 2'' ; 12, 22) partant de la zone centrale du bloc profilé considéré (1, 11, 21, 32, 42), sous la forme de rayons, et s'étendant jusqu'aux arêtes du bloc profilé, caractérisé par le fait que la zone centrale est massive, et est par conséquent dépourvue de quelconques profilages, au moins deux parmi les minces entailles (2a), partant de la zone centrale dans des directions opposées, s'étendant au moins pour l'essentiel dans le sens périphérique, et chacune des minces entailles (2, 2', 2'' ; 12, 22) conservant au moins pour l'essentiel, sur toute sa longueur, sa direction d'étendue fondamentale.
  2. Bandage pneumatique pour véhicule, selon la revendication 1, caractérisé par le fait que les minces entailles (2, 2', 2'', 12, 22) sont réalisées sous la forme de minces entailles présentant, observées par-dessus, une allure rectiligne, ondulée ou en zigzag.
  3. Bandage pneumatique pour véhicule, selon la revendication 1 ou la revendication 2, caractérisé par le fait que les minces entailles (22) s'étendant sous la forme de rayons présentent une allure légèrement curviligne observées par-dessus, notamment toutes les minces entailles (22), s'étendant à l'intérieur d'un bloc profilé (21), étant courbées dans une même direction.
  4. Bandage pneumatique pour véhicule, selon l'une des revendications 1 à 3, caractérisé par le fait que le nombre des minces entailles (2, 2', 2'', 12, 22) s'étendant sous la forme de rayons, dans le bloc profilé (1, 11, 21, 32, 42), est d'au moins 4 et est notamment compris entre 8 et 12.
  5. Bandage pneumatique pour véhicule, selon l'une des revendications 1 à 4, caractérisé par le fait que deux minces entailles (12) considérées, situées en vis-à-vis mutuel par rapport à la zone centrale, peuvent être reliées l'une à l'autre par l'intermédiaire d'une ligne droite, ces lignes droites présentant un point commun d'intersection au centre du bloc profilé (1).
  6. Bandage pneumatique pour véhicule, selon l'une des revendications 1 à 5, caractérisé par le fait que les extrémités des minces entailles présentent, dans la zone centrale du bloc profilé (1, 11, 21, 32, 42), un espacement minimal de deux millimètres.
  7. Bandage pneumatique pour véhicule, selon l'une des revendications 1 à 6, caractérisé par le fait que les minces entailles (2, 12, 22), s'étendant sous la forme de rayons, sont réparties d'une manière au moins pour l'essentiel uniforme dans le bloc profilé (1, 11, 21).
  8. Bandage pneumatique pour véhicule, selon l'une des revendications 1 à 7, caractérisé par le fait que les minces entailles (2') s'étendant sous la forme de rayons sont disposées et réparties, dans le bloc profilé (32), de façon telle que la somme de toutes les composantes de longueur desdites minces entailles (2'), projetables dans le sens axial, corresponde à au moins 1,5 fois, de préférence entre 2 et 3 fois la somme de toutes les composantes de longueur projetables dans le sens périphérique.
EP94890059A 1993-04-01 1994-03-21 Bandage pneumatique pour véhicule Expired - Lifetime EP0618091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0066093A AT401642B (de) 1993-04-01 1993-04-01 Laufstreifenprofil für einen fahrzeugreifen
AT660/93 1993-04-01

Publications (2)

Publication Number Publication Date
EP0618091A1 EP0618091A1 (fr) 1994-10-05
EP0618091B1 true EP0618091B1 (fr) 1997-07-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94890059A Expired - Lifetime EP0618091B1 (fr) 1993-04-01 1994-03-21 Bandage pneumatique pour véhicule

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EP (1) EP0618091B1 (fr)
AT (2) AT401642B (fr)
DE (1) DE59403506D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012108383A1 (de) 2012-09-10 2014-03-13 Continental Reifen Deutschland Gmbh Fahrzeugluftreifen

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19822573C1 (de) * 1998-05-20 1999-10-07 Continental Ag Fahrzeugreifen
JP2002029226A (ja) * 2000-07-18 2002-01-29 Bridgestone Corp 空気入りタイヤ
JP4726106B2 (ja) * 2001-09-20 2011-07-20 東洋ゴム工業株式会社 空気入りタイヤ
US7950426B2 (en) * 2007-06-08 2011-05-31 Bridgestone Americas Tire Operations, Llc Tread blocks having reduced edge stiffness
JP5266090B2 (ja) * 2009-02-23 2013-08-21 東洋ゴム工業株式会社 空気入りタイヤ
CN106255605B (zh) * 2014-08-19 2018-06-01 横滨橡胶株式会社 充气轮胎
US11059327B2 (en) * 2014-08-19 2021-07-13 The Yokohama Rubber Co., Ltd. Pneumatic tire
JP6657587B2 (ja) * 2015-04-10 2020-03-04 横浜ゴム株式会社 空気入りタイヤ
JP7145066B2 (ja) * 2018-12-27 2022-09-30 Ｔｏｙｏ Ｔｉｒｅ株式会社 空気入りタイヤ
US11298982B2 (en) * 2019-08-29 2022-04-12 The Goodyear Tire & Rubber Company Tread for a pneumatic tire
DE102020215798A1 (de) * 2020-12-14 2022-06-15 Continental Reifen Deutschland Gmbh Fahrzeugluftreifen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL36624C (fr) * 1932-11-04
CH566877A5 (en) * 1973-03-23 1975-09-30 Weber Gottfried Pneumatic tyre for road vehicles - has longitudinal and transverse grooves and staggered tyre edge cuts to give sectioned surface
US4312395A (en) * 1979-12-19 1982-01-26 The Goodyear Tire & Rubber Company Double contour block tread pattern
JPH062443B2 (ja) * 1987-08-18 1994-01-12 東洋ゴム工業株式会社 交差サイプを有するトレッドパタ−ンのタイヤ
FR2667544B1 (fr) * 1990-10-03 1993-07-02 Michelin & Cie Equipement pneumatique pour un vehicule roulant sur sols enneiges, verglaces.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012108383A1 (de) 2012-09-10 2014-03-13 Continental Reifen Deutschland Gmbh Fahrzeugluftreifen

Also Published As

Publication number Publication date
ATE156071T1 (de) 1997-08-15
DE59403506D1 (de) 1997-09-04
AT401642B (de) 1996-10-25
EP0618091A1 (fr) 1994-10-05
ATA66093A (de) 1996-03-15

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